Comparison of Hg0 capture efficiencies of three in situ generated sorbents

Tai Gyu Lee; Pratim Biswas; Elizabeth Hedrick

doi:10.1002/aic.690470418

Comparison of Hg⁰ capture efficiencies of three in situ generated sorbents

Tai Gyu Lee, Pratim Biswas, Elizabeth Hedrick

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

Three different sorbent materials (Ti-, Si-, and Ca-based) were compared for their mercury (Hg⁰) capture efficiencies in an entrained flow reactor. Agglomerated particles with a high specific surface area were generated in situ by injecting gas-phase sorbent precursors into a high-temperature furnace reactor. Titania particles in the presence of UV irradiation were most effective at mercury capture (> 98%). In situ generated CaO particles had a capture efficiency of 33% (without any UV irradiation), while SiO₂ was completely ineffective at Hg⁰ capture. The efficiency of elemental Hg capture of both CaO and TiO₂ particles decreased with increasing SO₂ concentration. The increase in the feed rate of the Ti sorbent resulted in the recovery of the higher Hg⁰ capture efficiency due to the availability of more active sites. The in situ generated titania sorbents were also effective at Hg⁰ capture (> 87%) at elevated temperatures (160°C).

Original language	English
Pages (from-to)	954-961
Number of pages	8
Journal	AIChE Journal
Volume	47
Issue number	4
DOIs	https://doi.org/10.1002/aic.690470418
Publication status	Published - 2001 Apr

All Science Journal Classification (ASJC) codes

Biotechnology
Environmental Engineering
Chemical Engineering(all)

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Comparison of Hg⁰ capture efficiencies of three in situ generated sorbents

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